I have a site show desks ,one desk have more than one size, size field is fieldset have width,depth and height use the field group.
|---field group size-----------------------------|
| width: === depth:=== height:== |
| |
|----------------------------------------------------|

"==="is text field can fill when creat new node.

I'd like set the multivalue field group,just like multivalue field,but i don't know how. see bellow.
|---field group size-----------------------------|
| width: === depth:=== height:== |
| |
|----------------------------------------------------|

|---field group size-----------------------------|
| width: === depth:=== height:== |
| |
|----------------------------------------------------|

|---field group size-----------------------------|
| width: === depth:=== height:== |
| |
|----------------------------------------------------|

if I just select each field(width depth height) multivalue
|---field group size-----------------------------|
| width: === depth:=== height:== |
| width: === depth:=== height:== |
| width: === depth:=== height:== |
|----------------------------------------------------|

It's not my want.

so how can't I do this ? I search modules, but not find one have this function .may d7 have?!